<template>
    <div>
        <div class='search'>
           <input v-model='keyword' class='search-input' type='text' placeholder='输入城市名称或拼音'/>
        </div>
        <div class='search-content' ref='search' v-show='keyword'>
            <ul>
                <li class='search-item border-bottom' v-for='item of list' :key='item.id' @click='handleCityClick(item.name)'>
                    {{item.name}}
                </li>
                <li class='search-item border-bottom' v-show='hasNoData'>
                    没有找到匹配数据
                </li>
            </ul>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
  name: 'CitySearch',
  props: {
    cities: Object
  },
  data () {
    return {
      keyword: '',
      list: [],
      timer: null
    }
  },
  computed: {
    hasNoData () {
      return !this.list.length
    }
  },
  watch: {
    keyword () {
      if (this.timer) {
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach(value => {
            if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1) {
              result.push(value)
            }
          })
        }
        this.list = result
      }, 100)
    }
  },
  methods: {
    handleCityClick (city) {
      this.chageCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['chageCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.search)
  }
}
</script>

<style lang='stylus' scoped>
@import '~styles/varibles.styl'
.search
    height: .72rem
    background: $bgColor
    padding: 0 .1rem
    .search-input
        box-sizing: border-box
        width: 100%
        height: .62rem
        line-height: .62rem
        padding: 0 .1rem
        text-align: center
        border-radius: .06rem
        color: #666
.search-content
    z-index: 1
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    background: #eee
    .search-item
        line-height: .62rem
        padding-left: .2rem
        background: #fff
        color: #666
</style>
